#include<bits/stdc++.h>
using namespace std;
const int N=1e5+5;
int n;
int a[N];
int main()
{
    freopen("duel.in","r",stdin);
    freopen("duel.out","w",stdout);
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        cin>>a[i];
    }
    sort(a+1,a+n+1);
    int ans=0;
    for(int i=2;i<=n;i++)
    {
        int js=1;
        while(a[i]==a[i-1])
        {
            i++;
            js++;
        }
        ans+=(max(0,js-ans));
    }
    cout<<ans<<endl;
    return 0;
}
